分别采取四种不同的工艺过程,按照配方TiO2+0.3mol%(SrCO3+Bi2O3+SiO2)+0.075mol%Ta2O5制备四种试样.通过压敏电压、非线性系数、复阻抗特性、伏安特性、势垒高度、介电频率特性和损耗频率特性的测定,研究了一次烧成、粉料预烧及预烧方式对TiO2基压敏陶瓷电性能的不同影响.结果表明,采取一次烧成工艺制备的试样具有压敏电压较低(E10mA=7.9 V·mm-1)、介电常数较大(εra=5.88×104)等特性,并从理论上对此作出一定的分析.
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